16,17-dimethoxy-5,7-dioxa-13$l^{5}-azapentacyclo[11.8.0.0^{2,10}.0^{4,8}.0^{15,20}]henicosa-1(21),2,4(8),9,13,15,17,19-octaen-13-ylium
16,17-dimethoxy-5,7-dioxa-13λ5-azapentacyclo[11.8.0.02,10.04,8.015,20]henicosa-1(13),2,4(8),9,14,16,18,20-octaen-13-ylium
16,17-dimethoxy-5,7-dioxa-13λ⁵-azapentacyclo[11.8.0.0²,¹⁰.0⁴,⁸.0¹⁵,²⁰]henicosa-1(21),2(10),3,8,13,15,17,19-octaen-13-ylium